Dead end clamp



Aug. 11, 1931.- l B, MYERS 1,818,571

' DEAD END CLAMP Filed Feb. 11A, 1930 A TToRl/y Patented Aug. 11, 1931UNITED. STATES 'LUTHRR'R MYERS, or WARREN, OHIO DEAD END cDAMr jApplication filed February 11, 1930. "Serial No. 427,460.

This invention relates to"an end coupling for wires or cables such as isvknown in the trade as a dead end clamp, which is commonly employed tosecure such end to a stationary support. l

The object of the invention is to provide an improved construction of`coupling that may readily be attached to the end of the wireor cable andlocked thereto by tension in a lengthwise direction and which mayreadily be disconnected without the loss or waste of such wire or cable.

Another object is to provide an improved dead-end clamp comprising anouter sleeve 4 and an inner core which latter may be slipped over theend of the cable and locked thereto by driving the sleeve over the core.

.With these and other objects in View, the invention is illustrated inthe accompanying drawings, wherein,-

Fig. 1 shows the complete coupling in elevation as viewed from one sidethereof.

Fig. 2 illustrates the same as viewed from a side at a right angle withrespect to that of Fig. 1.

Fig. 3 shows the device in top view.

Fig. 4 illustrates the detached yieldable core of theV clamp with thewire or cable-end attached thereto.

Fig. 5 shows the outer end of the detached core,-the wire or cable beingomitted.

Fig. 6 illustrates the inner end of the core,-the wire also beingomitted in this View.

Fig. 7 shows a central longitudinal section through the sleeve with thecore therein and the end of the wire or cable attached thereto, and

Fig. 8 illustrates the detached yielding core in side elevation.

Referring to the drawings the numeral 10, designates a tubular sleevehaving a tapered longitudinal passage 11 extending therethrough andprovided at its outer end with an enlarged head consisting of two spacedjaws 12, separated by a central slot 13. The central slot 13 imparts asemi-circular shape to the jaws in cross-section,-the inner side 14 ofeach aw being curved in continuation of the central opening through thesleeve.

vto the outer side of the core.

Each jaw 12 is provided with a crosswise extending hole or perforation15, and these two holes are in alinement so that a bolt or otherfastening may be passed crosswise therethrough to effect aconnectionwith a stationary object.A i f In addition to the outer sleeve10,1 pro# vide an interiorcore 16 which hasa body that is circular incross-section but tapered longitudinally on the exterior yfrom the innertoward the outer end thereof, which taper terminates at an annularshoulder` 17 that is spaced from the said outer end.

The annular shoulder 17, therefore consti-` tutes the greatest diameterof the .corel and 65. is located between the two ends of thelatter.

j VFromrthe annular shoulder 17 to the extreme outer end 18 of the corethelatterris reduced in diameter and forms a neck 19, for a purposethatwill presently be explained.

The core has a central interior longitudinal passage 20 which extendsIfromrend to end and said core also has a plurality of longitudinalslots21 extending from the inner smaller end 'j toward the outer end 7.5thereof.. l M fc. j In the present disclosure, the longitudinal openings21, are formed by `producing lengthwise slots through the body ofthecore all the way from theinner passage 20 8D The core also hasA aplurality OflOngituf dinal slots 22 extending therethroughfrom the innerlongitudinal passage20 to the outer side thereof, and these passages2285 extend from the outer end 18 of the core through `the neck 19 andannular exterior shoulder 17-toward the inner end of the core, butterminate at a point spaced'from the-said inner end. l l j 90 In thepresent disclosurerthere' are two. slots 21 at diametrically oppositesides of the core and two slots 22 also at diametri` cally-oppositesides, but iny planes at=right 95 angles to the slots 21.v f' "Thepurpose of these longitudinal slots 21 and 22 is tojproduce aiiexibility lat the ends of the core that will enable. said ends to besprung inwardly when clamped on the i exterior, as will presently bemore fully explained.

In effecting attachment of the coupling to a wire or cable-end 23, theouter sleeve 10, is first slipped over the end of the wire or cable, andsaid wire or cable-end is then inserted through the central passage 2Oof the core, and if the wire or cable is insulated, the insulation isstripped from the ends so that the several strands 24 of the wire may beseparated.

These separated wire strand-ends 24 are then bent back and laid aroundthe reduced neck 19 of the core between the outer end and the annularexterior shoulder 17, as shown in Figs. 4 and 7.

After all the Vstrand-ends have been bent back against the core-neck,thesleeve 10, is then drawn outward over the coref-the latter enteringthe tapered longitudinal passage l1 of the sleeve, and obviously, as thesleeve is forced or driven outwardly over the core, the llatter will bewedged in the tapered passage 1l vandl the inner and outer flexible oryielding ends of the core will be clamped about the wire or cablepassing therethrough and securely lock the parts together.

During the operation of driving the sleeve outwardly over the core,`thelatter will be lirmly seated in the bends 25 of the backturned wirestrands, while Vthe free-ends 26,

' of those strands will be held downraround the reduced neck because `ofthe encircling wall yof the sleeve-passage l1, and thus the sleeve andcore will be locked vtogether while the core and cable will be securelyengaged. Whenever it `is desired to disconnect the clamp, the sleeve maybe driven inwardly from over the core and the core and-wire strands"thusexposed Thewire strands will then be turned up from around the neckof :the core and the latter may then readily be drawn from the end ofthe wire or cable without wasting the cable. l'Obviously'as one end oftheclamp will be secured in any suitable. manner to-an insu-y lato'rfand some `stationary object, any pull of"the'cla1nped vwire that isdirected 'on the core,^will tend to tighten the clamp.

'.Having described my invention, I claim,-

vl. Adead end clamp for cables comprising an louter `sleeve having atapered longitudi-` nal passage therethrough and provided with meansadjacent to the larger endI of said passage for attaching it to astationary object, of a tapered core having a wedge it in thelongitudinal passage of the sleeve and said core also having a, centralpassage through which the end of the cable extends, the outer end of thecorebeing reducedcin diameter around its exterior and the ends ofthecable-:strands being bent back over the endfo'f the core and laid aroundthe reduced endfof thellatter. y y

2. Adead endV clamp for wires or cables comprising an outer sleevehaving a tapered passage therethrough, an exteriorly-tapered core toenter and wedge in the sleeve-passage said core also having a centralpassage to receive the wire end it is to engage,-the outer end of thecore bein(T reduced in diameter and the inner end o? said core havinglongitudinal Vslots extending through the inner end and toward thereduced end.

3. A dead end clamp for wires or cables comprising an outer sleevehaving a tapered passage therethrough, an exteriorly-tapered creto enterand wedge in the sleeve-passage said core also havingva central passageto receive the wire end it is to engage,-the outer end o' the core beingreduced, ,in diameter to provide a reduced neck at said end with ashoulder at the inner end of said neck and thebody of the core having alongitudinal slot crossing ythe -shoulder and extendingthrough the neckto the outer end and also'having another longitudinahslot which crossesthe shoulder and extends through the body to the inner end yof thelatter.

In ltestimony whereof I aliix inv sionature.

LUTHER B. Minus.

